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product. The MeAl describcs the ullsafe condition as:

authority of another country to identify and conect an unsafe condilion all an aviation

mandatory continuing airworthiness infoll11atlol1 (MeAl) originalcd by an aviation

listed above that would supersede an existing AD. This proposed AD results frolll

ACTION: Notice of proposed rulemaking (NPRM).

AGENCY: Federal Aviation Administration (FAA). DOT.

Airplanes

IDocket No. FAA-2009-*~*"'*; Directorate Identifier 2008-NM-169-ADI

Federal Aviation Administration

SU1\JIMARY: We propose to adopt a new airworthiness directive (AD) rOT the product

and -300A Series Airplanes, and Model Avro 146-RJ70A, 146-RIS5A, and 146-RJIOO

Airworthiness Directives; 8M SYSTEMS (Operations) Limitedfr-ype..Geflif~ateRIN 2120-AA64

DEPARTMENT OF TRANSPORTA nON

14CFR Par' 39

--Pffl¥iousLy...Hcld-b¥-3Rtish-Aemspace"'Regional Aircraftt Model BAe 146...1OOA, -10DA

In 1991, the UK Civil Aviation Authority (CAA) issued AD 015-08-91

[which corresponds to FAA .W 93-01-111, requiring the accomplishment

of inspections of, and in case of crack findings, con-cctivc actions Ollo the

wing top skin at rib '0' of pre-modification HCM0085 IC BAe 1-\.6 series

aircraft in accordance with British Aerospace Service Bulletin (SB) 57-41

dated 26 July 1991_Recently, BAE Systems (Operations) Ltd has

detcmlined that a revised inspection programme for the wing top skin and

joint strap at rib '0' Oil all BAe 146 and AVRO 146-RJ aircraft is

necessary to assure the continued slrucIllral integrity of this area_ Cracking

oflhe wing centre section top skin, ifundctected, could lead 10 structural

failure and consequent loss of the aircrafi.

~,nmw.",,, •.•~--
1491O-13-PJ

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

IDocket No. FAA-2009-*****; Directorate Identifier 2008-NM-169-AD)

RIN 2120-AA64

Airworthiness Directives; BAE Systems (Operations) Limited ModeJ SAe 146-1aOA, II~ l4--'lcfi

-200A, and -300A Series Airplanes, and Mode! Avro 146-RJ70A, 14G-RJ85A, and ~O\l'IIM,'~I"t11.

146-RJI00A Airplanes.

AGENCY: Federal Aviation Administration (FAA). DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the product

listed above that would supersede an existing AD. This proposed AD results from

mandatory continuing airworthiness infomlation (MC'Al) originated by an aviation

authority of another country to identify and correct an unsafe condition on an aviation

product. The MeAl describes the unsafe condition as:

In 1991, the UK Civil Aviation Authority (CAA) issued AD 015-08-91

[which con'e-sponds to FAA. AD 93-0 I-II J, requiring the accomplishment

of inspections of, and in case of crack findings, corrective aClions on, the

wing top skin at rib -0' of pre-modification HCM00851C BAe 146 series

aircran in accordance with British Aerospace Service Bulletin (SB) 57-41

dated 26 July 1991. Recently, BAE Systems (Operations) Ltd has

detcnnined that a revised inspection programme for the wing top skin and

joint strap at rib '0' on all BAe 146 and AVRO 146~RJ aircraft is

necessary to assure the continued structural integrity of this area. Cracking

of the wing centre section top skin, ifundetected, could lead to structural

failure and consequent loss of the aircraft.

"ME

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